add plymouth

config/graphical.nix

@@ -3,5 +3,6 @@
   isGraphical = true;
   imports = [
     ./kde
+    ./graphical/plymouth.nix
   ];
 }

config/graphical/plymouth.nix

@@ -0,0 +1,17 @@
+{config, ...}: {
+  boot = {
+    plymouth.enable = true;
+    consoleLogLevel = 0;
+    initrd.verbose = false;
+    kernelParams = [
+      "quiet"
+      "splash"
+      "boot.shell_on_fail"
+      "loglevel=3"
+      "rd.systemd.show_status=false"
+      "rd.udev.log_level=3"
+      "udev.log_priority=3"
+    ];
+    loader.timeout = 0;
+  };
+}

config/verbose.nix

@@ -0,0 +1,5 @@
+{...}: {
+  disabledModules = [
+    ./graphical/plymouth.nix
+  ];
+}

machine/pc-installer/default.nix

@@ -18,5 +18,11 @@
       ./graphical.nix
     ];
   };
+  specialisation.graphical-verbose = {
+    configuration.imports = [
+      ./graphical.nix
+      "${nixos-config}/config/verbose.nix"
+    ];
+  };
   isInstaller = true;
 }